class_docstr: Group of timers. Borrowed from Nvidia Megatron code
code: def __call__(self, name):
      if name not in self.timers:
          self.timers[name] = self.Timer(name)
      return self.timers[name]
  
imports: import time
  from numpy import mean
  from deepspeed.utils.logging import log_dist
  from deepspeed.accelerator import get_accelerator
label_desc: Use image node_id 3 for calling the SynchronizedWallClockTimer obj's underlying member method code with example usage: obj.__call__(name) and returns: self